133121404 has 24 divisors (see below), whose sum is σ = 251714960. Its totient is φ = 61236864.

The previous prime is 133121389. The next prime is 133121431. The reversal of 133121404 is 404121331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12187 + ... + 20365.

Almost surely, 2^133121404 is an apocalyptic number.

It is an amenable number.

133121404 is a deficient number, since it is larger than the sum of its proper divisors (118593556).

133121404 is a wasteful number, since it uses less digits than its factorization.

133121404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8509 (or 8507 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 133121404 is about 11537.8249250021. The cubic root of 133121404 is about 510.6021389818.

Adding to 133121404 its reverse (404121331), we get a palindrome (537242735).

The spelling of 133121404 in words is "one hundred thirty-three million, one hundred twenty-one thousand, four hundred four".